Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f3607595049e70df4741727e3680b86b2a548a67908527602a3f6b02360185c' 
  AND token = 'U9796VLU3J3UgD8fRyXk7x8X60C9ayBf7V/E76vTr/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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