Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36a55ad18ba8c6536ebb4610d3b3df96b5b972cb8d6b51a663e3a5e0fc28990b' 
  AND token = 'j3callU6FqkpUROBt+vXRpgcANrvWPTV0Y5Zts9OrlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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