SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdb655eaa474c7b9780cc1106772663647d27a83d669c83bd563a1d452677fb4' 
  AND token = 'LchZkZbGtGitwrj3m/nqmRcFBu11p2QFYAq0+T0X7RU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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