Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17076317e9801338297c268adc074dcece3117cc560a1f7f7b852ae09da24a2b' 
  AND token = 'CRClo8ywE5+8B2MBvyNpmXbGy9xihmntjjaFX4mq0x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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