Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '267af757ecd85214ae0b32db2c085ddb91bdafcf0ac9adff10359b5e7253545c' 
  AND token = 'cJSetedVGsm0CMxKWSLr6g+jZOmgSfgs1WdNmffXl2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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