Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06bbeaeee3197dd6ff8dc7cdf8fdfcdd3910a3a3685ed484263a5e3a575e917b' 
  AND token = '6le68RJkWVAkxzqAqipPG4+o39APJ2TPjN5t9hltvpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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