Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2293bafe8d0ecc9f313b4fedbf6da4729fa7455e136ca2edca698807fe4fe38c' 
  AND token = '2hVKZ5o0RfRU6fT1jwQQUsFS/hPt1Et9Vp5Y2VFRZyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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