Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bd3a4e9cbf6a6a3de8d986f5ed0bc435fe5d8cb0ba465c95e4cb035df4c012a' 
  AND token = '16FPbuA0vV3c8ievSGZD++Q3mIKpVqBsnsC79UZb1h0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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