Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc8a31e72129a64aefcbb6b141965a84069662ca431f755d161c522cb7563dfc' 
  AND token = 'HlGhuEdAJS2v0LM0c8aNa0FLiGKA9wK/cKp2B4RW/0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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