Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7d13a6fec13a31a66bb02ed88209cbb32b1eaee00ac34179900138f79f1fe30' 
  AND token = 'HDJ2oWo697dg5gCkqKb3sCGLgbD5Bdk4eHqcCsXRzZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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