Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bdffbdf4ac39176f3d903fa86ced3548b4596b33101286861345437a490a7000' 
  AND token = 'rsI2LxNj7yWc+dyAd88wQPobwxrRzkg+w61m+NtQ064=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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