Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1f27fa3358a931dbb9e5c65ee7c8fcd9e5be7e5259a48b09f39f24817a5d96e' 
  AND token = 'tL8p2OmQHO+cEkH5Uaz2moLG1c6qiEj/mb2OWNNhOhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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