Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f5e93190f18041ab672e8e4d0c4a54642c31f5e88da915266a950d7b64a26a' 
  AND token = 'YcB5q6Pq0X+j3JEmF7F+lxm8EgI1AjMEIcg7Nnf6lt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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