Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4de82a0f7cad053f2eaada4219aae822d79651bf3a515b40157fdb2ccf8449ed' 
  AND token = 'PkR1F+Re/DG7pp7pN4nM8EU6rDO5G3sTnhIHtu8Thlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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