Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f11b8d74aa013d28cf4c94101c36f155fc9d37ba749c5965b97e29e6e9e53954' 
  AND token = 'IEHariknhI6sCcpDBL3iigy9TO9qNlIojcDRbYfu9W8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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