Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b77f8c7bc6a9674a7b446fe3662ff794116f298ffc58f2f8def03df6485dfbdf' 
  AND token = 'KHCBohkMYf/81PZMXpRqv6WOKrkksLrOjT6I8sYA1J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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