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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '500882227a8953101721a45169cc9b1c25ebc41cbab584bae2f0c7a21e803ce5' 
  AND token = 'Orp664iwMOib6I7k9BMKjvdL9aiuTgh8RabI9EEDYOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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