Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edf94460234b1f6393fa4c433caa00f6f6d53a9b1b7a572c60db1af36bed76b8' 
  AND token = '9QsKALtt9FMC0Sn7iJWNprLD5RA7V1HhE0pwvUoTKQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}