Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f27cea3d66c0a3b6a922e99c6a9c66b5e788b6227a6e2f5b3310fd7e18b734b' 
  AND token = 'RXT1XhiE0AnPEE9WjiO4Is3T3asydg2NGZMAEZSgmnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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