Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a4e82d2b07dea9b75aebb691a3f41b732c31a2520d6dd81898437f267fae88' 
  AND token = 'racUceAKGG5+eH+DSqO2mQId+0ewvl7b0QBg004lNis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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