Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83415cd1da9f6fe418ae7c1acbd6fc811df7255471c3b59caed20bef7270997d' 
  AND token = '+5PqSP6kddB6E2SbTuBOrvV8I/5UhTfdEw3LSKpH/Sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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