Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae11b9571d5efb74c785ad4ca4b8d9248e2d4662e0dc0f897537965894c0a2b4' 
  AND token = 'gGHirvuOb4PFfgSOLdkjB7OEAcRgV8PQz1u8kE2dMwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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