Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '437a227f8b636f3b86c062284415acee6a9aef0b366682e6c31a225a4a63f940' 
  AND token = 'LZTjzjVOZO9Pu+gJ4DQIkVMqTHreq78ecV5/YRVTSl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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