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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3581e31e9363213604b07b2b34d61c4448f4c1c2bd9d92a9ce4ed1cc0613ab0' 
  AND token = '2u0x40cmu4NSPNp0rLdPL64Eqsu/PBJ0FqLZB69uQpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}