Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5351272a9a4345616d89b201ae8fde95cbe0eb0e1f4c7eefcadb4e29b43cd757' 
  AND token = 'clliLBaQ7zHW8kiCtxjuHMXjHq1PoHTE+ChhWQVSCnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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