Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9228d5669b3b3d61e5daa18da180251db43c60adc66106ed241992fdca256565' 
  AND token = 'uORbdmd5ipyrNY0DXQROik+nbWxOe5PU0NZyiCRKEdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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