Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc537ab2d9806396aa294975d175cb5796772a8e5ff1a4f8a8fec5ccce286567' 
  AND token = 'oFHXRiZXaVTtAk5WBARtAbl99NQodCyGlxiaTc03uyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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