Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a351187e0abd6965cd2677158bb85df2de089b3bddbdce588246d63b178145e3' 
  AND token = '0THPJQhfKnUJfAloREhuj4KuxfwjHkEgjoq9W1vvu7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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