Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dfb7dd0deb90960542d60e73ea4897a8ea7f0c5506ddb9a4e35241764934cd8' 
  AND token = 'D2y9cUMClw/JHQdZuIPbJ1bonlX3lBgCGmFcqmd3XJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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