Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37078977e28adf86f34a494f332b7a3e23e9ccb6e40d42de555d1d20fc3d7348' 
  AND token = '+H1gYpZ+TdwU3j7n4HTrIbfNHsNouO4VWDFrznLmt/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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