Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae13338910f2a35de7816104a047dcdb0fc7981cfed8c5d0519b36d1eb1a149' 
  AND token = '6tboEiEfNGKenWzeV7/xTtejN3xj8PwRJcLREvrmZvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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