Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4fa489de3346d6936e3461c711640720407f8cf27a173f0df7632cb0becfcdb' 
  AND token = 'XD2FRjCrR5w77ktAqAu1BJZUBRq1QyYw939gOda6UuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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