Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fbe500668b61718ab25e2a3683734725f4fa4dbdbce6c6c2e7b3cc8704c3528' 
  AND token = 'TLI3GfNau5pN4G3bneicD1dPsQOBA2XkhYGuwkc6CJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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