SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93c32aec5131a2275edd968dbb7609549ac9ec798cd032bb6d0384bf66500aba' 
  AND token = 'u88tS5s9xe/EoYJfQg1nfDuVjarm3qawZmEuRYhB+q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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