Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b60a8f3ddfbaba946e71595105ba53a4e70188cc76a07b386aed192d761f3fde' 
  AND token = '8bqsTgxG9iC+z6yQtGqoYZ3f/3nDoXEv18Rwnw2AAuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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