Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30884928040d70f91e93d4317d65ef49a22100aef446c0451c641849351a9148' 
  AND token = 'u8xHdZdy2cBSy3BEUMqL4TTSGabYh5ZRROPNJGtcTH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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