Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed95ee8fb178d1be2775bdb1689f9feca265eb6c8f3f714d42022545566df0db' 
  AND token = 'RsYg/GWud8qUAer0+pPIqWPB8GyIGs9XOGNB3Zokk30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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