Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '381d5dd88fe73e5619eba070c652bfd4c8197dd645be9b328fb980fa44735c5e' 
  AND token = '3/DbPUORXt15gtZphtKmNTvBe6ffgEHxNQsBAaL+GTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00283

JSON explain

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