Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cca1a7cf92476b23ef9aaccf3273dd2f9c6e44ca198b1372c265292181536426' 
  AND token = 'sMAxIDxsCH5ACYn1LQ8oqzWaY/TWYkQ176Tp6WpJ40w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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