Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b2f2fd782d36e1841f2857ade99a79a456c11bcf783f04c260675b053af029c' 
  AND token = 'S9oCj6/a/J9iPStfvKe2tY64SriN6bsk/POsUxAJ9yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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