Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33988d37b7d9beb59bec1841e4f11f056be17fc747104cd5648d5d30ef134a7b' 
  AND token = 'CP5b+augiUxvH1p0+o7M7fpAgRpzAdIASQKxpsTJJaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}