Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85b84de7be6ae18052f137574ed405de939530495136559042db281e0708a58b' 
  AND token = 'MgHZ0ImmX4YZJN0xkT2ZdTnu66eCPFA99j97khYqQHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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