Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c8e0b9beb695b20ed5b241b3764f6fc0b5fbff0f22d92ba8c212caa6d4abd827' 
  AND token = 'v4Uu6XQ3XXOQwNq2fx7O1OCZkz3ZURoBlsubCa8Wqls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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