Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0ed7ac875c94d05599308facd48d02be6381791ffba1efde1925bdb9af6efc7f' 
  AND token = 't8yfE2VIqEFbnaCfGPW6USNZz5Cfp3CqmqEsWJ231VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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