Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '340c60465e46f674cd6011fd4c3fbe7c994e2c60c3e268e72604b37e94b8f1d3' 
  AND token = 'lJY3XVIuxa3Sbo5dPy538CpNM6tzhtTOSL86OAURL9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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