Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cb930c6f74003bfee11f8cf9adb953e15f50b399bbf38daa8168b5721c25298' 
  AND token = 'ETZyHHH4LPMW/HlEIRoQ47ge2+vcvHKnYEhhzTn4P8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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