Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b5f08bc793b6eb8bd57e7968939b6ecd7d4efe4cd331faf10387ae2321fd215' 
  AND token = 'FYWd5JpbZ5ut5hp+96U6Bt64z55ad/2ziA26bg6ySkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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