Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3f565af61c1343f51b735c8fccac2145ed1dd1ad4f117bc52189683495560e9' 
  AND token = 'ccAJdZsvkR6C0GuUGNyiDbkbm9p2xL5cmiwlnBKLiEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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