Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd063a1ecf3ec04f3f1283c628484f2f6a7b9950b529c129a6d07f7708bf9bbd8' 
  AND token = 'NvfcZp57cVFBEvpxjnSJvUF3Maz9mqfT6LkitKJb518=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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