Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e567342ddacbd95cfb82b86028d4c2b38f3499e73dc883d8c46a82d22af00c3' 
  AND token = 'xwtnQCLNQ2GZ9EwRgmSpGY2svT3jEE1vqIefwsceNco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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