SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '717cd86dc32222302fe33b647b982498b89f324048855775c4ac1b9b46e2b4cc' 
  AND token = 'wl+EkQYsnUV+AFZzt1EeKVo9X+yHI5jZvLS83xTRD70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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