Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ba1c01a1f7713e586b11bae044e7995733444432b62a1f644531c644a60e45b' 
  AND token = 'jo/IIZowJ17rgoey9sbO4vbipw1MHHLf6mehvlc6uUo=' 
  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"
    }
  }
}