Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b11a870a676bae3b55a8083e9ef529c5f9b0caaa0a58aadc986f69eaba5fd87' 
  AND token = 'CHY0zwwnkmuhKq7qLiaBi5v3J4N+oW7/RqoI0amXTBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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