Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f18fba959a6523b2cf6f642782716eadd68277a2c121e5237051581fedcdfe5' 
  AND token = '2DUAsOTsJXhzyV9zdugH098Mpi7yZK3Oz8uu65Zrxw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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