Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd78132b9a65540195f187d98135a6744b5fac42e60d09950dcb731f620fc4cf8' 
  AND token = 'Qo8UKFFylSIPqVPG8aF3lyb/4ucbAys+aSFtz89Gwto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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