Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '542e20799461a03192b540d9509a5b5b650b534bdcd548db2b7749d81d0678d7' 
  AND token = 'rd/wvOMsE82otUDbNH0Fy/qsjUfOR1NmxhaPzMzfAcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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