Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1a37d0b93abee94f033cc7acdd35f3370e1fcf14001191303a718666cfcb619' 
  AND token = 'BFRK2iy38WGkrSuLRe94sf2pg8w/9+EZOrkx+ZyNIk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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