Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b16982f6a882e79c41951290704c5aebb98ba09524451e264776981a5676da9e' 
  AND token = 'q/+BRmHd+PS8aYDvSGwnthwrWOmJiDq9xa5micDBcog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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