Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '228dc2a3ff3a5d40570775ad6a5a0095f85cc404c505e030db5e0c9b8ce806e2' 
  AND token = 'KxCIlloFiJwfgHCNoMxMKvgYEjsLwKjNDg7X7r5nUbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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