Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04c191baab089c8dd071c6b9a0c61dd18ee4a206d170ba5c2c61559766c4ff5a' 
  AND token = 'aRqK4UhPj48T83Exb5bpGU89u29WGimTu3gatjuDwrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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