Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73b1c7289570d114600fb8c2f58928a02b353355835ec874a065cae35fbdab32' 
  AND token = 'G38TqVXvQbxMWzz+UnJd6s6ZJZeoU3MNz21l2hmHHqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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