Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaecba5f7972efa50f5fd1c01eef83bcf2c5b0136131c73d8e436529b97cabe7' 
  AND token = 'lLw9Pxer73Qx6QlWdE9GJ5svEkOs8ukmCP6fYlNdrHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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