SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '258148272df040ec86ffa93e723311c5d2f8f16fb3c81dadd67660a0881df926' 
  AND token = 'pqZgq/oQNpgpezgJsJHROgpKkGlhHHPSQ1AxFRoWG/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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