Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33de28639d5f5637449dbe1d54d67d3f5a7d7bc0113ea56445841b65ac47b569' 
  AND token = 'waVb+DBZP7dtHZmFf2A8e7JceMKf1+IVaMDRKuJxFXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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