Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db1645b2a3435b57feecb416447a9490263785348cb1f57066b7a27fc7379d13' 
  AND token = 'ttVoqWsXTm7KRpj1KxDGXOVRwL9dkSmK595Iwkm2vn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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