Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8a7d652ebf7639bc64ac9f9bb9cee2078559b3b31cf4cc9c15ddf33cca469cc' 
  AND token = 'H88HzxIQet4aRZ5kB/m2LvG2U7mh9itjHk30ISsGAZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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