Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a14614e7511f2c89c310f5a21e8af8a8bd0d671506beee9d03d8a22e5885160d' 
  AND token = 'H4d1/AX0QQuvLvcxcEx3CENAGiLlleKw6qp78XZvqeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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