Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27232ae6e6db5efe9bc21ee5be2cdb25335ca7c264c7e98785cdc330aaeb3e23' 
  AND token = 'ckyvU1PZmZRMcVYJw9+lqGJ7l1vyKJJXNG/0hjcrevA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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