Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e90d0fb9bc79cc9044176c1f83db1b06dd3141dba7b9e1ee277c643a24c144b0' 
  AND token = 'tXQxQm6DfK78w78nvjL54lOh4lkOaAdOG3wpSY8PXkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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