Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9a3b60e1e57f7a1e447400c2f74431f6829f749a8b4b65d774fe0bb72bceff' 
  AND token = 'BAU4oCi3/fDZ6e5tNZbFdFeuM5vhOA+o2YU0Q8Y6Fm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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