Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633a4e7bbea1774f156399a21b8998141b02c5a9810a778eade9419b39aeafc3' 
  AND token = '0jPRuEzTCdJM/1N0X0IHfpkNmYOjN4/c82xiET+ZEsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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