Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '5a0835daf26886097fc88b0b449ec859dc1b05fb7881868023e0c85f8590ff2b' 
  AND token = 'mR4E2o+f95aPZM3MfJWjOWnGK1P1nrMnvLkvD8OW3z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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