Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '087898db31bef3e503767768eed4e46ee835cab37d663d4d1baaa52da3ddcd47' 
  AND token = 'y4f9RkqyhH3z+0ck3KqKCgidVBQYRjbkI7qG8hsXlAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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