Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92c6b412152ec4944b30f5e2dac1896d1f4f19b5a15cece3a9b7cb0e1a98c45f' 
  AND token = 'FH13VRmSOCuO0ykDqKYVRwFOLOvB8u9qSrLCUzGPSPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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